/*
* Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
*/
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.15 2006-09-13 06:31:11 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
#include "ospf.h"
#include "ospf6.h"
static const struct tok ospf6_option_values[] = {
{ OSPF6_OPTION_V6, "V6" },
{ OSPF6_OPTION_E, "External" },
{ OSPF6_OPTION_MC, "Multicast" },
{ OSPF6_OPTION_N, "NSSA" },
{ OSPF6_OPTION_R, "Router" },
{ OSPF6_OPTION_DC, "Demand Circuit" },
{ 0, NULL }
};
static const struct tok ospf6_rla_flag_values[] = {
{ RLA_FLAG_B, "ABR" },
{ RLA_FLAG_E, "External" },
{ RLA_FLAG_V, "Virtual-Link Endpoint" },
{ RLA_FLAG_W, "Wildcard Receiver" },
{ RLA_FLAG_N, "NSSA Translator" },
{ 0, NULL }
};
static const struct tok ospf6_asla_flag_values[] = {
{ ASLA_FLAG_EXTERNAL, "External Type 2" },
{ ASLA_FLAG_FWDADDR, "Fforwarding" },
{ ASLA_FLAG_ROUTETAG, "Tag" },
{ 0, NULL }
};
static const struct tok ospf6_type_values[] = {
{ OSPF_TYPE_HELLO, "Hello" },
{ OSPF_TYPE_DD, "Database Description" },
{ OSPF_TYPE_LS_REQ, "LS-Request" },
{ OSPF_TYPE_LS_UPDATE, "LS-Update" },
{ OSPF_TYPE_LS_ACK, "LS-Ack" },
{ 0, NULL }
};
static const struct tok ospf6_lsa_values[] = {
{ LS_TYPE_ROUTER, "Router" },
{ LS_TYPE_NETWORK, "Network" },
{ LS_TYPE_INTER_AP, "Inter-Area Prefix" },
{ LS_TYPE_INTER_AR, "Inter-Area Router" },
{ LS_TYPE_ASE, "External" },
{ LS_TYPE_GROUP, "Multicast Group" },
{ LS_TYPE_NSSA, "NSSA" },
{ LS_TYPE_LINK, "Link" },
{ LS_TYPE_INTRA_AP, "Intra-Area Prefix" },
{ LS_TYPE_INTRA_ATE, "Intra-Area TE" },
{ LS_TYPE_GRACE, "Grace" },
{ 0, NULL }
};
static const struct tok ospf6_ls_scope_values[] = {
{ LS_SCOPE_LINKLOCAL, "Link Local" },
{ LS_SCOPE_AREA, "Area Local" },
{ LS_SCOPE_AS, "Domain Wide" },
{ 0, NULL }
};
static const struct tok ospf6_dd_flag_values[] = {
{ OSPF6_DB_INIT, "Init" },
{ OSPF6_DB_MORE, "More" },
{ OSPF6_DB_MASTER, "Master" },
{ 0, NULL }
};
static const struct tok ospf6_lsa_prefix_option_values[] = {
{ LSA_PREFIX_OPT_NU, "No Unicast" },
{ LSA_PREFIX_OPT_LA, "Local address" },
{ LSA_PREFIX_OPT_MC, "Multicast" },
{ LSA_PREFIX_OPT_P, "Propagate" },
{ LSA_PREFIX_OPT_DN, "Down" },
{ 0, NULL }
};
static char tstr[] = " [|ospf3]";
/* Forwards */
static void ospf6_print_ls_type(u_int, const rtrid_t *);
static int ospf6_print_lshdr(const struct lsa6_hdr *);
static int ospf6_print_lsa(const struct lsa6 *);
static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *);
static void
ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid)
{
printf("\n\t %s LSA (%d), %s Scope%s, LSA-ID %s",
tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
ls_type & LS_TYPE_MASK,
tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
ls_type &0x8000 ? ", transitive" : "", /* U-bit */
ipaddr_string(ls_stateid));
}
static int
ospf6_print_lshdr(register const struct lsa6_hdr *lshp)
{
TCHECK(lshp->ls_type);
TCHECK(lshp->ls_seq);
printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u",
ipaddr_string(&lshp->ls_router),
EXTRACT_32BITS(&lshp->ls_seq),
EXTRACT_16BITS(&lshp->ls_age),
EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr));
ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid);
return (0);
trunc:
return (1);
}
static int
ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length)
{
const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr;
u_int wordlen;
struct in6_addr prefix;
if (lsa_length < sizeof (*lsapp) - 4)
goto trunc;
lsa_length -= sizeof (*lsapp) - 4;
TCHECK2(*lsapp, sizeof (*lsapp) - 4);
wordlen = (lsapp->lsa_p_len + 31) / 32;
if (wordlen * 4 > sizeof(struct in6_addr)) {
printf(" bogus prefixlen /%d", lsapp->lsa_p_len);
goto trunc;
}
if (lsa_length < wordlen * 4)
goto trunc;
lsa_length -= wordlen * 4;
TCHECK2(lsapp->lsa_p_prefix, wordlen * 4);
memset(&prefix, 0, sizeof(prefix));
memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4);
printf("\n\t\t%s/%d", ip6addr_string(&prefix),
lsapp->lsa_p_len);
if (lsapp->lsa_p_opt) {
printf(", Options [%s]",
bittok2str(ospf6_lsa_prefix_option_values,
"none", lsapp->lsa_p_opt));
}
printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric));
return sizeof(*lsapp) - 4 + wordlen * 4;
trunc:
return -1;
}
/*
* Print a single link state advertisement. If truncated return 1, else 0.
*/
static int
ospf6_print_lsa(register const struct lsa6 *lsap)
{
register const struct rlalink6 *rlp;
#if 0
register const struct tos_metric *tosp;
#endif
register const rtrid_t *ap;
#if 0
register const struct aslametric *almp;
register const struct mcla *mcp;
#endif
register const struct llsa *llsap;
register const struct lsa6_prefix *lsapp;
#if 0
register const u_int32_t *lp;
#endif
register u_int prefixes;
register int bytelen;
register u_int length, lsa_length;
u_int32_t flags32;
const u_int8_t *tptr;
if (ospf6_print_lshdr(&lsap->ls_hdr))
return (1);
TCHECK(lsap->ls_hdr.ls_length);
length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length);
/*
* The LSA length includes the length of the header;
* it must have a value that's at least that length.
* If it does, find the length of what follows the
* header.
*/
if (length < sizeof(struct lsa6_hdr))
return (1);
lsa_length = length - sizeof(struct lsa6_hdr);
tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr);
switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) {
case LS_TYPE_ROUTER | LS_SCOPE_AREA:
if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options))
return (1);
lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options);
TCHECK(lsap->lsa_un.un_rla.rla_options);
printf("\n\t Options [%s]",
bittok2str(ospf6_option_values, "none",
EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)));
printf(", RLA-Flags [%s]",
bittok2str(ospf6_rla_flag_values, "none",
lsap->lsa_un.un_rla.rla_flags));
rlp = lsap->lsa_un.un_rla.rla_link;
while (lsa_length != 0) {
if (lsa_length < sizeof (*rlp))
return (1);
lsa_length -= sizeof (*rlp);
TCHECK(*rlp);
switch (rlp->link_type) {
case RLA_TYPE_VIRTUAL:
printf("\n\t Virtual Link: Neighbor Router-ID %s"
"\n\t Neighbor Interface-ID %s, Interface %s",
ipaddr_string(&rlp->link_nrtid),
ipaddr_string(&rlp->link_nifid),
ipaddr_string(&rlp->link_ifid));
break;
case RLA_TYPE_ROUTER:
printf("\n\t Neighbor Router-ID %s"
"\n\t Neighbor Interface-ID %s, Interface %s",
ipaddr_string(&rlp->link_nrtid),
ipaddr_string(&rlp->link_nifid),
ipaddr_string(&rlp->link_ifid));
break;
case RLA_TYPE_TRANSIT:
printf("\n\t Neighbor Network-ID %s"
"\n\t Neighbor Interface-ID %s, Interface %s",
ipaddr_string(&rlp->link_nrtid),
ipaddr_string(&rlp->link_nifid),
ipaddr_string(&rlp->link_ifid));
break;
default:
printf("\n\t Unknown Router Links Type 0x%02x",
rlp->link_type);
return (0);
}
printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric));
rlp++;
}
break;
case LS_TYPE_NETWORK | LS_SCOPE_AREA:
if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options))
return (1);
lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options);
TCHECK(lsap->lsa_un.un_nla.nla_options);
printf("\n\t Options [%s]",
bittok2str(ospf6_option_values, "none",
EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)));
printf("\n\t Connected Routers:");
ap = lsap->lsa_un.un_nla.nla_router;
while (lsa_length != 0) {
if (lsa_length < sizeof (*ap))
return (1);
lsa_length -= sizeof (*ap);
TCHECK(*ap);
printf("\n\t\t%s", ipaddr_string(ap));
++ap;
}
break;
case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
return (1);
lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric);
printf(", metric %u",
EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC);
tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix;
while (lsa_length != 0) {
bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
if (bytelen < 0)
goto trunc;
lsa_length -= bytelen;
tptr += bytelen;
}
break;
case LS_TYPE_ASE | LS_SCOPE_AS:
if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric))
return (1);
lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric);
TCHECK(lsap->lsa_un.un_asla.asla_metric);
flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric);
printf("\n\t Flags [%s]",
bittok2str(ospf6_asla_flag_values, "none", flags32));
printf(" metric %u",
EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) &
ASLA_MASK_METRIC);
tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix;
lsapp = (struct lsa6_prefix *)tptr;
bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
if (bytelen < 0)
goto trunc;
lsa_length -= bytelen;
tptr += bytelen;
if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
struct in6_addr *fwdaddr6;
fwdaddr6 = (struct in6_addr *)tptr;
if (lsa_length < sizeof (*fwdaddr6))
return (1);
lsa_length -= sizeof (*fwdaddr6);
TCHECK(*fwdaddr6);
printf(" forward %s",
ip6addr_string(fwdaddr6));
tptr += sizeof(*fwdaddr6);
}
if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
if (lsa_length < sizeof (u_int32_t))
return (1);
lsa_length -= sizeof (u_int32_t);
TCHECK(*(u_int32_t *)tptr);
printf(" tag %s",
ipaddr_string((u_int32_t *)tptr));
tptr += sizeof(u_int32_t);
}
if (lsapp->lsa_p_metric) {
if (lsa_length < sizeof (u_int32_t))
return (1);
lsa_length -= sizeof (u_int32_t);
TCHECK(*(u_int32_t *)tptr);
printf(" RefLSID: %s",
ipaddr_string((u_int32_t *)tptr));
tptr += sizeof(u_int32_t);
}
break;
case LS_TYPE_LINK:
/* Link LSA */
llsap = &lsap->lsa_un.un_llsa;
if (lsa_length < sizeof (llsap->llsa_priandopt))
return (1);
lsa_length -= sizeof (llsap->llsa_priandopt);
TCHECK(llsap->llsa_priandopt);
printf("\n\t Options [%s]",
bittok2str(ospf6_option_values, "none",
EXTRACT_32BITS(&llsap->llsa_options)));
if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix))
return (1);
lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix);
prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix);
printf("\n\t Priority %d, Link-local address %s, Prefixes %d:",
llsap->llsa_priority,
ip6addr_string(&llsap->llsa_lladdr),
prefixes);
tptr = (u_int8_t *)llsap->llsa_prefix;
while (prefixes > 0) {
bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
if (bytelen < 0)
goto trunc;
prefixes--;
lsa_length -= bytelen;
tptr += bytelen;
}
break;
case LS_TYPE_INTRA_AP | LS_SCOPE_AREA:
/* Intra-Area-Prefix LSA */
if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid))
return (1);
lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid);
TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
ospf6_print_ls_type(
EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype),
&lsap->lsa_un.un_intra_ap.intra_ap_lsid);
if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix))
return (1);
lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
printf("\n\t Prefixes %d:", prefixes);
tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix;
while (prefixes > 0) {
bytelen = ospf6_print_lsaprefix(tptr, lsa_length);
if (bytelen < 0)
goto trunc;
prefixes--;
lsa_length -= bytelen;
tptr += bytelen;
}
break;
case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
if (ospf_print_grace_lsa(tptr, lsa_length) == -1) {
return 1;
}
break;
case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
if (ospf_print_te_lsa(tptr, lsa_length) == -1) {
return 1;
}
break;
default:
if(!print_unknown_data(tptr,
"\n\t ",
lsa_length)) {
return (1);
}
break;
}
return (0);
trunc:
return (1);
}
static int
ospf6_decode_v3(register const struct ospf6hdr *op,
register const u_char *dataend)
{
register const rtrid_t *ap;
register const struct lsr6 *lsrp;
register const struct lsa6_hdr *lshp;
register const struct lsa6 *lsap;
register int i;
switch (op->ospf6_type) {
case OSPF_TYPE_HELLO:
printf("\n\tOptions [%s]",
bittok2str(ospf6_option_values, "none",
EXTRACT_32BITS(&op->ospf6_hello.hello_options)));
TCHECK(op->ospf6_hello.hello_deadint);
printf("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
EXTRACT_16BITS(&op->ospf6_hello.hello_helloint),
EXTRACT_16BITS(&op->ospf6_hello.hello_deadint),
ipaddr_string(&op->ospf6_hello.hello_ifid),
op->ospf6_hello.hello_priority);
TCHECK(op->ospf6_hello.hello_dr);
if (op->ospf6_hello.hello_dr != 0)
printf("\n\t Designated Router %s",
ipaddr_string(&op->ospf6_hello.hello_dr));
TCHECK(op->ospf6_hello.hello_bdr);
if (op->ospf6_hello.hello_bdr != 0)
printf(", Backup Designated Router %s",
ipaddr_string(&op->ospf6_hello.hello_bdr));
if (vflag) {
printf("\n\t Neighbor List:");
ap = op->ospf6_hello.hello_neighbor;
while ((u_char *)ap < dataend) {
TCHECK(*ap);
printf("\n\t %s", ipaddr_string(ap));
++ap;
}
}
break; /* HELLO */
case OSPF_TYPE_DD:
TCHECK(op->ospf6_db.db_options);
printf("\n\tOptions [%s]",
bittok2str(ospf6_option_values, "none",
EXTRACT_32BITS(&op->ospf6_db.db_options)));
TCHECK(op->ospf6_db.db_flags);
printf(", DD Flags [%s]",
bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags));
TCHECK(op->ospf6_db.db_seq);
printf(", MTU %u, DD-Sequence 0x%08x",
EXTRACT_16BITS(&op->ospf6_db.db_mtu),
EXTRACT_32BITS(&op->ospf6_db.db_seq));
/* Print all the LS adv's */
lshp = op->ospf6_db.db_lshdr;
while (!ospf6_print_lshdr(lshp)) {
++lshp;
}
break;
case OSPF_TYPE_LS_REQ:
if (vflag) {
lsrp = op->ospf6_lsr;
while ((u_char *)lsrp < dataend) {
TCHECK(*lsrp);
printf("\n\t Advertising Router %s",
ipaddr_string(&lsrp->ls_router));
ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type),
&lsrp->ls_stateid);
++lsrp;
}
}
break;
case OSPF_TYPE_LS_UPDATE:
if (vflag) {
lsap = op->ospf6_lsu.lsu_lsa;
TCHECK(op->ospf6_lsu.lsu_count);
i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count);
while (i--) {
if (ospf6_print_lsa(lsap))
goto trunc;
lsap = (struct lsa6 *)((u_char *)lsap +
EXTRACT_16BITS(&lsap->ls_hdr.ls_length));
}
}
break;
case OSPF_TYPE_LS_ACK:
if (vflag) {
lshp = op->ospf6_lsa.lsa_lshdr;
while (!ospf6_print_lshdr(lshp)) {
++lshp;
}
}
break;
default:
break;
}
return (0);
trunc:
return (1);
}
void
ospf6_print(register const u_char *bp, register u_int length)
{
register const struct ospf6hdr *op;
register const u_char *dataend;
register const char *cp;
op = (struct ospf6hdr *)bp;
/* If the type is valid translate it, or just print the type */
/* value. If it's not valid, say so and return */
TCHECK(op->ospf6_type);
cp = tok2str(ospf6_type_values, "unknown LS-type", op->ospf6_type);
printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length);
if (*cp == 'u') {
return;
}
if(!vflag) { /* non verbose - so lets bail out here */
return;
}
TCHECK(op->ospf6_len);
if (length != EXTRACT_16BITS(&op->ospf6_len)) {
printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len));
return;
}
dataend = bp + length;
/* Print the routerid if it is not the same as the source */
TCHECK(op->ospf6_routerid);
printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid));
TCHECK(op->ospf6_areaid);
if (op->ospf6_areaid != 0)
printf(", Area %s", ipaddr_string(&op->ospf6_areaid));
else
printf(", Backbone Area");
TCHECK(op->ospf6_instanceid);
if (op->ospf6_instanceid)
printf(", Instance %u", op->ospf6_instanceid);
/* Do rest according to version. */
switch (op->ospf6_version) {
case 3:
/* ospf version 3 */
if (ospf6_decode_v3(op, dataend))
goto trunc;
break;
default:
printf(" ospf [version %d]", op->ospf6_version);
break;
} /* end switch on version */
return;
trunc:
fputs(tstr, stdout);
}